Electromagnetic switching device
AssigneeSiemens Aktiengesellschaft
InventorsKarl-Hans Barnklau, Johann Drexler, Peter Hartinger, Gerhard Wossner
Life of this patent
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Abstract
An electromagnetic switching device includes an electromagnetic drive device and at least one electrical contact that, when a starting current is applied to the drive device, can be transferred by the drive device from a disconnect position (contact opened) into a bridging position (contact closed). When the switching device is fully installed, the contact can be blocked in the disconnect position and can be mechanically blocked in the disconnect position by an arresting element that can be connected to the switching device. As a result, the contact remains in the disconnect position even when the starting current is applied to the drive device.
Claims21
An electromagnetic switching device, comprising:
- an electromagnetic drive apparatus;
- at least one electrical contact, the contact being movable via a contact link support from a disconnected position to a bridging position by the electromagnetic drive apparatus when a pull-in current is applied to the electromagnetic drive apparatus, the contact being closed in the bridging position and being open in the disconnected position;
- a basic appliance;
- and
- an additional appliance, connected to the basic appliance, contact link support and the at least one contact being arranged in the basic appliance, the additional appliance including,
- an extension, connected to the contact link support in such a way that the extension is positively guided by the contact link support, the extension being mechanically blockable by use of a locking element, connectable to the additional appliance and blockable in the disconnected position of the contact, such that the extension, the contact link support and the contact are locked in the disconnected position, even when the pull-in current is applied to the electromagnetic drive apparatus.
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Dependencies are inferred from the claim text.